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Finding the Fourth Proportional to 667.37, 1,001.71 and 320.95

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Solution

The fourth proportional to 667.37, 1,001.71 and 320.95 is: 481.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.37 : 1,001.71 = 320.95 : x
  2. Step 2: Convert to fraction form
    667.37/1,001.71 = 320.95/x
  3. Step 3: Cross multiply
    667.37x = 1,001.71 × 320.95
  4. Step 4: Simplify right side
    667.37x = 321,495.52
  5. Step 5: Solve for x
    x = 321,495.52/667.37
  6. Step 6: Final answer
    x = 481.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.